Illustration of Effective Parameters on Growth of ZnO Micro/Nano Rods, on the Borosilicate Glass via Hydrothermal Process
Hexagonal micro/nanorods of ZnO were synthesized via mild hydrothermal growth method under different conditions. The growth of the rods was accomplished in two manners: firstly, on bare borosilicate glass, and secondly, on ZnO seed layer prepared by sol–gel spin coating process. All the obtained surfaces were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The studies demonstrate that, although with the decrease of concentration of precursor solution on bare borosilicate glass, the diameter of the rods decreases, but the orientation will deteriorate and the density of the rods will decrease. On the other hand, hydrothermal growth on the seed layer causes the decrease in the diameter of the rods, while maintaining the orientation along the c-axis; therefore, the presence of seed layer plays an important role in decreasing the diameter of the rods; so that at a constant concentration, compared with the case without seed layer, the diameter of rods decreased 10 times from ∼500 nm to ∼50 nm.
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Document Type: Research Article
Publication date: November 1, 2010
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